Radon is a serious issue everywhere, not just Germany, and not just near mountains. Testing and mitigating radon in homes is one of the easiest and least expensive ways to reduce cancer risks.
The EPA has a good guide on radon and homes [1]. Even if you do not have a radon detector, it's very inexpensive to get periodic tests done (you can do them at home with a test kit). IIRC they are around $15-20 retail, although some fire departments or cities may provide them for free.
The only way to be sure your home does not have a radon issue is to test it yourself.
The EPA has a good guide on radon and homes [1]. Even if you do not have a radon detector, it's very inexpensive to get periodic tests done (you can do them at home with a test kit). IIRC they are around $15-20 retail, although some fire departments or cities may provide them for free.
The only way to be sure your home does not have a radon issue is to test it yourself.
[1] http://www.epa.gov/radon/pubs/citguide.html